Now showing items 1-20 of 29

  • A frequency approach on MIMO DSP for optical communication systems 

    Palou Garcia, Xavier (Universitat Politècnica de Catalunya, 2013-02-28)
    Master thesis (pre-Bologna period)
    120 months embargo
    [ANGLÈS] Spatial Division Multiplexing (SDM) has arisen during the last years as the most promising technique to overcome the increasing necessity of capacity of the communication systems while avoiding the theoretical ...
  • All-optical communication system based on orthogonal frequency-division multiplexing (OFDM) and optical time-division multiplexing (OTDM) 

    Cañibano Nuñez, Héctor (Universitat Politècnica de Catalunya, 2014-05-13)
    Master thesis (pre-Bologna period)
    Open Access
    Covenantee:  Danmarks tekniske universitet
    [ANGLÈS] We propose and demonstrate a novel principle that combines optical orthogonal frequency-division multiplexing (O-OFDM) and optical time-division multiplexing (OTDM). The principle is based on generating and ...
  • Analytical blocking probability model for hybrid immediate and advance reservations in optical WDM networks 

    Triay Marquès, Joan; Cervelló Pastor, Cristina; Vokkarane, Vinod M. (2013)
    Article
    Restricted access - publisher's policy
    Immediate reservation (IR) and advance reservation (AR) are the two main reservation mechanisms currently implemented on large-scale scientific optical networks. They can be used to satisfy both provisioning delay and low ...
  • A resource management scheme for multi-user GFDM with adaptive modulation in frequency selective fading channels 

    Tornés Molins, Bernat (Universitat Politècnica de Catalunya, 2016-05-03)
    Bachelor thesis
    Open Access
    Covenantee:  Technische Universität Dresden
    This final project focus on designing and evaluating a resource management scheme for a multi-user generalized frequency division multiplexing (GFDM) system, when a frequency selective fading channel and adaptive modulation ...
  • Chirp-based direct phase modulation of VCSELs managed by Neural Networks 

    Kais Carranza, Johanna Libertad (Universitat Politècnica de Catalunya, 2019-05-29)
    Master thesis
    Open Access
    VCSEL's capacity of direct modulation and its low cost makes this device a feasible cost-effective transmitter for ultra-dense wavelength division multiplexing (uDWDM) metro-access networks using coherent detection. However, ...
  • Cost-effective spatial super-channel allocation in Flex-Grid/MCF optical core networks 

    Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Spadaro, Salvatore (2018-01-01)
    Article
    Open Access
    Space Division Multiplexing (SDM) is a key technology to cope with the bandwidth limitations of single mode fibers. Multi-Core Fibers (MCFs) are considered as a promising candidate technology to implement SDM, due to their ...
  • Design of a real-time multiplexed blood flow sensorial system 

    Mitjans Coma, Marc (Universitat Politècnica de Catalunya, 2018-01-18)
    Master thesis
    Restricted access - confidentiality agreement
  • Dynamic traffic grooming in Joint Switching (JoS)-enabled flex-grid/SDM optical core networks 

    Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Open Access
    We propose and evaluate a dynamic traffic grooming strategy enhancing the performance of JoS-enabled Flex-Grid/SDM networks. Results disclose up to 120% and 44% additional carried network traffic vs. no grooming and existing ...
  • Efficient time gating in ultrafast optical TDM networks 

    Yazdani, Arash; Rincón Rivera, David; Sallent Ribes, Sebastián (2014-12-01)
    Article
    Restricted access - publisher's policy
    Ultrafast optical communication is the backbone of high-speed global networking infrastructure. Optical time division multiplexing (OTDM) is a popular technique for embedding data from many simultaneous users on a single ...
  • Elastic Networks thematic network results I: Planning and control of Flex-Grid/SDM 

    Moreno Muro, Francisco Javier; Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Pavón Mariño, Pablo; Solé Pareta, Josep; Martínez, Ricardo; Casellas Regi, Ramón; Vilalta, Ricard; Muñoz González, Raul; Mata Sáez, Javier; Ruiz Pérez, Lidia; Merayo Álvarez, Noemí; Miguel Jiménez, Ignacio de; Durán Barroso, Ramón J. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Open Access
    This paper overviews the approach of the Elastic Networks research network to address different issues of planning and control of Flex-Grid/SDM optical networks. Firstly, we present the Net2Plan open-source planning tool ...
  • Evaluation of core-continuity-constrained ROADMs for flex-grid/MCF optical networks 

    Moreno Muro, Francisco Javier; Rumipamba Zambrano, Rubén Darío; Pavón Mariño, Pablo; Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2017-11-01)
    Article
    Open Access
    To effectively keep pace with the global IP traffic growth forecasted in the years to come, flex-grid over multi-core fiber (MCF) networks can bring superior spectrum utilization flexibility, as well as bandwidth scalability ...
  • Experimental demonstration of long-distance space-division multiplexing transmission over few-mode and multi-core fibers 

    Mestre Adrover, Miquel Àngel (Universitat Politècnica de Catalunya, 2013-02-13)
    Master thesis (pre-Bologna period)
    Open Access
    [ANGLÈS] After the extremely fast growth over last two decades, single-mode fibers capacity is reaching its recently revealed fundamental limit, imposed by a combination of Shannon's information theory and fiber nonlinearities. ...
  • Intensity modulation and direct detection OFDM dimensioning for next-generation passive optical networks 

    Calmels, Bruno Alberto (Universitat Politècnica de Catalunya, 2012-08-26)
    Master thesis
    Open Access
    [ANGLÈS] A cost-effective architecture for next-generation passive optical networks is designed and dimensioned, based on intensity modulation and direct detection optical orthogonal frequency division multiple access.
  • Investigation on Crosstalk in Multi-core Optical Fibers 

    Tapia Martinez, Ludwig Adolfo (Universitat Politècnica de Catalunya, 2015-09)
    Master thesis
    Open Access
    We start by describing what SDM is, the problem at hand for it’s been considered and the different solutions it can provide. We focus on Multi - Core Fibers (MCF) as the favorite solution re garding SDM and ...
  • Mode Division Multiplexing using MIMO Processing 

    Porcar Pujol, Oriol (Universitat Politècnica de Catalunya / Technical University of Denmark. Department of Photonics Engineering - High Speed Optical Communications, 2012-02)
    Master thesis (pre-Bologna period)
    Open Access
    Covenantee:  Danmarks tekniske universitet
    [ANGLÈS] Mode division multiplexing technologies in multimode optical fibers are being considered as one of the possible solution to the ever growing user capacity demands. Problems derived from this kind of fibers can be ...
  • Modeling physical-layer impairments in multi-domain optical networks 

    Yannuzzi, Marcelo; Marín Tordera, Eva; Serral Gracià, René; Masip Bruin, Xavier; González de Dios, Óscar; Jimenez Chico, Javier; Verchere, Dominique (IEEE Computer Society Publications, 2011)
    Conference report
    Restricted access - publisher's policy
    The advantages of optical transparency are still confined to the boundaries of a domain, since the optical signals are subject to O/E/O conversions at the border nodes that separate two optical domains. The extension ...
  • Multibeam systems for the detection of gas flares in the water column 

    Zwanzig, Christian (SARTI, 2016)
    Conference lecture
    Open Access
    Wärtsilä ELAC Nautik is one major global player in the multibeam business. The multibeam systems are marketed under the well-known brand name SeaBeam, including systems for medium water depth and deep-water areas. The ...
  • Next Generation Optical Access Networks: from TDM to WDM 

    Gutiérrez González, Lluís; Garfias Hernandez, Paola; Andrade Jardín, Marilet de; Cervelló Pastor, Cristina; Sallent Ribes, Sebastián (INTECH, 2010-03)
    Part of book or chapter of book
    Open Access
  • Nyquist Modulation vs OFDM for Fiber-optic Communications 

    Escuder Folch, Carles (Universitat Politècnica de Catalunya, 2016-06)
    Bachelor thesis
    Open Access
    In nowadays society, the need of fast, reliable communications is growing faster and faster each day. For this reason, there is the need of improving the current communications systems in terms of speed (faster data ...
  • On the scalability of dynamic Flex-Grid/SDM optical core networks 

    Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Spadaro, Salvatore (2018-09-04)
    Article
    Restricted access - publisher's policy
    Future optical core networks realizing Flex-Grid and Space Division Multiplexing (Flex-Grid/SDM) will be key to effectively cope with the rapid growth of the Internet traffic, thanks to their superior capacity and spectrum ...